--coughs
Okay, well, to start off:
I personally think there are enough parties as it is. Sure, they're sometimes rare, but it's difficult for even some of the most hard-workin' and active people playing this game to attend the slightest of parties. The staff take a lot of time and push themselves just for one party, as Vespian stated, and, in my own personal experience, it's rather hard for people to take time off their personal lives due to school, work, family, etc.
However,
parties ARE fun and everlast in a good experience for the users attending. They are enjoyable - for most, I assume - and I do like to bring out my party self on occasion.
Thanks,
Re.